1. Even if we assume there is a definite release date in late January, it is only mid-November now. It is VERY common in the music industry for release dates to get pushed back as the date approaches, and there are a LOT of reasons that that can happen. Between now and late January, the date can change SEVERAL times, even if the band and label have a fixed date in mind right now.
I mean, it could change, but I don't see how. I think that because they're revealing track names, they must be REALLY close to being completely done and say if the album comes out Jan 22 and the band reveal artwork and begin the next stage of promotion on Nov 22, I wouldn't see any reason to delay the album. I wouldn't know that much about the way this works though.
2. No, people at the venue are generally NOT aware of any inside information relating to the release of an album. They have no idea of that type of information other than what the promoters tell them, and the promoters do not know anything other than what the label or management tell them. People who run concert venues are not music insiders.
'Insider info' was definitely a poor word choice on my part, but what the promoters tell them is bound to be more correct than speculation on the part of a journalistic website such as MI which as far as I can gather, read the social media post about the tour then wrote the article taking the phrase 'debuting the album live' and not considering that it was talking about how the LIVE PERFORMANCE is going to debut on the 18th of February in London rather than the performance on the 18th being the first time the audience will listen to it.
I'm admittedly not really aware how any of this works and it's purely guesswork, but based on how far away late January still is, I would assume that everything is going according to plan. Well, apart from the title leak but I suppose that's what they get when they say they will perform the new album live without officially announcing the name. Do you know why DT announced the tour before the name?